APA (7th ed.) Citation

Ingersoll, R. G. (2009). The Ghosts, and Other Lectures. Project Gutenberg.

Chicago Style (17th ed.) Citation

Ingersoll, Robert Green. The Ghosts, and Other Lectures. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Ingersoll, Robert Green. The Ghosts, and Other Lectures. Project Gutenberg, 2009.

Warning: These citations may not always be 100% accurate.